Archive for category: Arduino

PIR sensor from TAUTIC.COM

February 23, 2013 | Arduino, My Projects | By: Mark VandeWettering

A few days ago, I heard that Jayson Tautic (@tautic), manufacturer and purveyor of a interesting electronic prototyping goodies, had put up an interesting offering: a small PIR (passive infra red) motion detector. I’m always up for a new sensor to play with, so I ordered a pair for fun, and they arrived on Friday. […]

Some small experiments with Arduino sound…

November 29, 2012 | Arduino, My Projects | By: Mark VandeWettering

Last year, I spent a little bit of time to create a set of blinking Christmas lights that I could mount in a hat. It was powered by an ATtiny13 and mounted in an Altoids tin. While setting up my Christmas tree last weekend, I found them, and they still work. In case you missed […]

ArduinoSudoku – sudoku on arduino

July 26, 2012 | Arduino | By: Mark VandeWettering

Just a quickie Arduino project that I ran across this morning: Sudoku on the Arduino. It’s pretty cute, since it uses the Arduino tvout library to generate video, meaning that you can display and play on your TV set. Neat! The only real description of the project is inside the zip file which you can […]

The first Internet of Things Bay Area Meetup and the Air Quality Egg…

March 29, 2012 | Arduino, Internet of Things, Microcontrollers | By: Mark VandeWettering

Last night, I met with Nanode creator Ken Boak and Chris Jefferies from tinajalabs.com at Cafe Actual in Berkeley for the inaugural IoTBayArea meetup. IoT groups are already going strong in many cities like London, Amsterdam, and NYC, but now that Ken is operating here in the SF Bay Area, he wanted to get a […]

Arduino Hole Dimensions Drawing

March 12, 2012 | Arduino | By: Mark VandeWettering

I’ve been kind of busy and distracted lately, so I haven’t had much time to get any embedded microcontrollers. I did dust off an Arduino FIO that I never played with, and charged up a 1000maH LiPo battery to power it. While it was blinking, I dug out my Xbees and started thinking of a […]

Breadboarding a Tellymate for the Arduino…

March 6, 2012 | Arduino | By: Mark VandeWettering

The microcontrollers of today are in many ways superior to the simple eight bit computers that I learned to program as a teenager, but one way in which most of them are decidedly inferior is that they have only a very limited number of actual peripherals. After all, even my simplest Atari 400 back in […]

Examining the output of a simple remote-keyless-entry transmitter…

February 20, 2012 | Amateur Radio, Arduino, electronics | By: Mark VandeWettering

Yesterday I was looking (sadly unsuccessfully) for some BPW32 photodiodes that I know I have somewhere, when I ran across some of 434 Mhz transmitter modules from Sparkfun (now a retired part) that I had never used. These little $4 transmitters are commonly used for remote-keyless access or similar applications. They have just four pins: […]

A simple beacon keyer for the ATtiny13

February 18, 2012 | Arduino | By: Mark VandeWettering

Roger, G3XBM built a simple beacon for light communication using a K1EL beacon keyer chip and a handful of other components. I didn’t have any of those chips around, but I did have some Atmel ATtiny13s lying around. I hacked this simple program together to send Morse code in two different ways: on pin PB1 […]

More on ATtiny programming…

February 15, 2012 | Arduino, electronics | By: Mark VandeWettering

Last night’s hacking adventure was inspired by a couple of recent posts from Roger, G3XBM having to do with light based communication. The first was his simple beacon design: it’s just a keyer chip, a MOSFET, a voltage regulator, and some (beefy) current limiting resistors. Roger used this beacon to do some non-line-of-sight communications via […]

Web-based control of an RGB LED via the Nanode, an Arduino compatible microcontroller

February 12, 2012 | Arduino, electronics | By: Mark VandeWettering

Okay, I finally got some time to record a video about a simple little webserver project I hacked together earlier this week. My wife Carmen got me a Nanode kit from Wicked Device around Christmas. These are Arduino compatible development boards which include a Microchip ENC28J60 Ethernet device to enable web connectivity. One slight drawback […]

maniacbug is an Arduino wizard…

February 1, 2012 | Arduino | By: Mark VandeWettering

Ken Boak was nice enough to gift me with a pair of Nanodes when he was out visiting last month. Much to my embarrassment, I haven’t had much time to play with them, so tonight I tried to do a bit more research to figure out how I could use them in some more advanced […]

Interesting “feature” re: _delay_ms in avr-libc

January 31, 2012 | Arduino, Atmel AVR, Microcontrollers | By: Mark VandeWettering

A couple of my projects have used the tiniest of the Atmel ATtiny chips: the ATtiny13. I have written one or two programs in assembler for these chips, but I prefer to work with avr-gcc whenever possible. What’s amazing is that you actually can use a sophisticated C compiler to generate code for such a […]

A $.33 MAX232CPE, or a $0.01 2N3904?

January 28, 2012 | Arduino, electronics | By: Mark VandeWettering

In response to my previous post, @xek replied: @brainwagon has anyone suggested the stupid bjt inverting “buffer” trick? 1/28/2012 7:04 pm via TweetCaster for AndroidReplyRetweetFavorite @xek Josh Myer Well, the fact is I had heard of doing that. It’s not really hard to rig something that will convert the RS232 level from the GPS into […]

Tinkering with an old GPS receiver…

January 28, 2012 | Amateur Radio, Arduino | By: Mark VandeWettering

I used to be an electrical engineer like you, then I took an arrow in the knee. (If you don’t get this, google for “arrow in the knee”, and guess what Xbox game I spent the morning and afternoon playing instead of working on something cool.) I’ve had a number of projects that could benefit […]

High Frequency Precision Sine Wave Synthesis for the Arduino by Adrian Freed

January 23, 2012 | Arduino | By: Mark VandeWettering

While researching something completely different, I found Adrian Freed’s very cool page with code to generate high quality sine waves using PWM on the Arduino. This code could serve as an audio frequency signal generator, or as the basis of a computer music project. It also demonstrates some non-trivial Arduino wizardry in dealing with PWM […]